import Vue from 'vue'
import Router from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'

Vue.use(Router)

const router= new Router({
  routes: [
    {path:'/',redirect:'/login'},
 { path:"/login",component: Login },
 { path:"/home",component: Home }
  ]
})
//挂载路由导航守卫
router.beforeEach((to,from,next) => {
// to将要访问的路径
// from代表从哪个路径跳转而来
// next是一个函数表示放行
// next()放行 next('/') 强制跳转
  if(to.path === '/login') return next()
  //获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if(!tokenStr) return next('login')
  next()
})

export default router